pinctrl: sunrisepoint: Add missing Interrupt Status register offset

Commit 179e5a61 ("pinctrl: intel: Remove default Interrupt Status
offset") removes default interrupt status offset of GPIO controllers,
with previous commits explicitly providing the previously default
offsets. However, the is_offset value in SPTH_COMMUNITY is missing,
preventing related irq from being properly detected and handled.

Fixes: f702e0b9 ("pinctrl: sunrisepoint: Provide Interrupt Status register offset")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=205745


Cc: stable@vger.kernel.org
Signed-off-by: Boyan Ding <boyan.j.ding@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>